i cant launch voltz 2.0.4

[Makkei]

When i try to update voltz from version 1.0.11 to 2.0.4 it stops after 44% and than a message with the words

"Error downloading file for the following pack: Voltz

Failed to download http://mirror.technicpack.net/Technic/lib/fml//fml_libs15.zip

Pease consult the modpack author. "

i alredy tried to downlad the lik above and copy and phase the win rar folder into the voltz cache folder but when i restart the updating the folder gets deleted and it tries to update everything again...

pls help me i rly wana play voltz again :(