Unzipping Error unzipping file

[supermanpopcorn]

So I recently made a modpack : http://www.technicpack.net/modpack/details/pb-realms-reloaded.416664 and I keep getting the error :

Error unzipping a file for the following modpack: PB realms reloaded

error in opening zip file

Please consult the modpack author.

 

How do I fix the problem for me and everyone who downloads this?

[plowmanplow]

• Your modpack.jar is in RAR archive format. All archives intended for use in the platform must be in ZIP format. The modpack.jar file is simply the Forge universal binary JAR file renamed to "modpack.jar". Nothing else needs to be done to it except in very rare circumstances.
• You have Thaumic Tinkerer for Forge/MC 1.7.2. Get the 1.6.4 version.
• You have Modular Powersuit Addons but not Modular Powersuits or Numina on which it depends.
• You should update ProjectRed to fix some known crash issues.
• You really need to be including a full compliment of config files in your modpack archive.