Getting [WARNING]/[SEVERE] Messages + Any Improvements?

[Jess18]

I'm pretty new to Technic and Tekkit Lite and I was wondering if there is any additional steps I can take to improve the Tekkit Lite 0.6.5 server I made. For example when I start my server I get the following warning and severe messages:

[WARNING] [OmniTools] Version Check Failed: https://dl.dropboxusercontent.com/u/57416963/Minecraft/OmniTools/version.txt

[WARNING] [ThermalExpansion] Version Check Failed: https://dl.dropboxusercontent.com/u/57416963/Minecraft/ThermalExpansion/version.txt

[sEVERE] [ForgeModLoader] [AppEng] Starting Applied EnergistIcs

[WARNING] [ForgeModLoader] Forestry missing - MFR Forestry Compat not loading

[WARNING] [ForgeModLoader] Pam's HC base missing - MFR Pam HC Compat not loading

[WARNING] [ForgeModLoader] Pam's Weee! Flowers missing - MFR Pam Weee! Flowers Compat not loading

[WARNING] [ForgeModLoader] Sufficient Biomes missing - MFR Sufficient Biomes Compat not loading

[WARNING] [ForgeModLoader] Thaumcraft missing - MFR Thaumcraft Compat not loading

[WARNING] [ForgeModLoader] Twilight Forest missing - MFR Twilight Forest Compat not loading

[WARNING] [ForgeModLoader] XyCraft missing - MFR Xycraft Compat not loading

[WARNING] [iC2] BuildCraft integration: Railcraft integration not loaded: java.lang.NoClassDefFoundError: railcraft/common/api/core/items/ItEmRegistry

[sEVERE] [ForgeModLoader] [AppEng] GregTech Integration Disabled.

[WARNING] [NEIPlugins] NEIPlugins is client-side only mod

[sEVERE] [ForgeModLoader] Detected leaking worlds in memory. There are 4 worlds that appear to be persisting. A mod is likely caching the world incorrectly

[sEVERE] [ForgeModLoader] The world 1acfb924 (world) has leaked.

[sEVERE] [ForgeModLoader] The world 6fa6289b (world) has leaked.

Is there anything I can do to remove or reduce the problems I'm having? I want to make a good stable server for me and my friends if anyone can help that would be great ^_^

[Jess18]

Got these two today, I think it's a bug, I'd post it in the bugs section but it won't let me post there, maybe someone can for me?

2013-12-05 07:20:54 [sEVERE] [ForgeModLoader] A critical server error occured ha

ndling a packet, kicking 7214

java.lang.ClassCastException: ic2.advancedmachines.common.TileEntityRotaryMacera

tor cannot be cast to ic2.core.block.TileEntityBlock

at ic2.core.block.BlockMultiID.a(BlockMultiID.java:149)

at vq.placeBlockAt(ItemBlock.java:208)

at vq.a(ItemBlock.java:97)

at ur.a(SourceFile:88)

at ir.a(ItemInWorldManager.java:424)

at iv.a(NetServerHandler.java:579)

at fk.a(SourceFile:58)

at cg.b(TcpConnection.java:458)

at iv.d(NetServerHandler.java:136)

at iw.b(NetworkListenThread.java:57)

at ht.b(SourceFile:30)

at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:703)

at ho.r(DedicatedServer.java:269)

at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:599)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:497)

at fy.run(SourceFile:849)

2013-12-05 07:20:54 [WARNING] [Minecraft] Failed to handle packet for JessicaMae

89/127.0.0.1: java.lang.ClassCastException: ic2.advancedmachines.common.TileEnti

tyRotaryMacerator cannot be cast to ic2.core.block.TileEntityBlock

java.lang.ClassCastException: ic2.advancedmachines.common.TileEntityRotaryMacera

tor cannot be cast to ic2.core.block.TileEntityBlock

at ic2.core.block.BlockMultiID.a(BlockMultiID.java:149)

at vq.placeBlockAt(ItemBlock.java:208)

at vq.a(ItemBlock.java:97)

at ur.a(SourceFile:88)

at ir.a(ItemInWorldManager.java:424)

at iv.a(NetServerHandler.java:579)

at fk.a(SourceFile:58)

at cg.b(TcpConnection.java:458)

at iv.d(NetServerHandler.java:136)

at iw.b(NetworkListenThread.java:57)

at ht.b(SourceFile:30)

at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:703)

at ho.r(DedicatedServer.java:269)

at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:599)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:497)

at fy.run(SourceFile:849)

2013-12-05 07:22:22 [sEVERE] [ForgeModLoader] A critical server error occured ha

ndling a packet, kicking 19001

java.lang.ClassCastException: ic2.advancedmachines.common.TileEntityRotaryMacera

tor cannot be cast to ic2.core.block.TileEntityBlock

at ic2.core.block.BlockMultiID.a(BlockMultiID.java:149)

at vq.placeBlockAt(ItemBlock.java:208)

at vq.a(ItemBlock.java:97)

at ur.a(SourceFile:88)

at ir.a(ItemInWorldManager.java:424)

at iv.a(NetServerHandler.java:579)

at fk.a(SourceFile:58)

at cg.b(TcpConnection.java:458)

at iv.d(NetServerHandler.java:136)

at iw.b(NetworkListenThread.java:57)

at ht.b(SourceFile:30)

at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:703)

at ho.r(DedicatedServer.java:269)

at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:599)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:497)

at fy.run(SourceFile:849)

2013-12-05 07:22:22 [WARNING] [Minecraft] Failed to handle packet for JessicaMae

89/127.0.0.1: java.lang.ClassCastException: ic2.advancedmachines.common.TileEnti

tyRotaryMacerator cannot be cast to ic2.core.block.TileEntityBlock

java.lang.ClassCastException: ic2.advancedmachines.common.TileEntityRotaryMacera

tor cannot be cast to ic2.core.block.TileEntityBlock

at ic2.core.block.BlockMultiID.a(BlockMultiID.java:149)

at vq.placeBlockAt(ItemBlock.java:208)

at vq.a(ItemBlock.java:97)

at ur.a(SourceFile:88)

at ir.a(ItemInWorldManager.java:424)

at iv.a(NetServerHandler.java:579)

at fk.a(SourceFile:58)

at cg.b(TcpConnection.java:458)

at iv.d(NetServerHandler.java:136)

at iw.b(NetworkListenThread.java:57)

at ht.b(SourceFile:30)

at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:703)

at ho.r(DedicatedServer.java:269)

at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:599)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:497)

at fy.run(SourceFile:849)

[Jess18]

I was moving my machines around when this happened