[update failed?!]

thank you so much, it actually worked :)

[update failed?!]

I know a solution that works for every modpack and version.

1. Clear cache

2. Go to C:\Users\User\AppData\Roaming\.techniclauncher\cache

3. Download the right VANILLA minecraft.jar(tekkit needs 1.2.5, the latest voltz needs 1.4.7)

4. Rename that jar to "minecraft_1.2.5.jar" or "minecraft_1.4.7.jar"

5. Put it in that cache file shown in step 2

6. Run the launcher and play

NOTE: Dont click clear cache again or it may be ruined again.