Having a similar problem but here is what I get, I am guessing it has something to do with a 32 bit file on a 64 bit comp...
C:\.....\Tekkit_Server_2.0>java -Xmx3G -Xms2G -jar Tekkit.jar
java.lang.UnsatisfiedLinkError: C:\Users\Student\AppData\Local\Temp\jline_git-Bu
kkit-1_1-R4-b1938jnks.dll: Can't load IA 32-bit .dll on a AMD 64-bit platform
at java.lang.ClassLoader$NativeLibrary.load(Native Method)
at java.lang.ClassLoader.loadLibrary0(Unknown Source)
at java.lang.ClassLoader.loadLibrary(Unknown Source)
at java.lang.Runtime.load0(Unknown Source)
at java.lang.System.load(Unknown Source)
at jline.WindowsTerminal.loadLibrary(WindowsTerminal.java:315)
at jline.WindowsTerminal.initializeTerminal(WindowsTerminal.java:240)
at jline.Terminal.setupTerminal(Terminal.java:75)
at jline.Terminal.getTerminal(Terminal.java:26)
at jline.ConsoleReader.<init>(ConsoleReader.java:191)
at jline.ConsoleReader.<init>(ConsoleReader.java:186)
at net.minecraft.server.MinecraftServer.<init>(MinecraftServer.java:86)
at net.minecraft.server.MinecraftServer.main(MinecraftServer.java:592)
at org.bukkit.craftbukkit.Main.main(Main.java:134)
C:\.....\Tekkit_Server_2.0>pause
Press any key to continue . . .