My modpack won't work.

[SnappTechnic]

I just made my modpack "Donutcraft SMP/SSP" and whenever I try to start it I get an unzipping error. What are the possible causes of this error and how can I fix it?

[NobleCheif117]

I might know how to fix the unzipping problem, but i have a different problem, first urs did u use dropbox?

[NobleCheif117]

if you used drop box, goto your pack page on? tekkit and add ?dl=1 to the end of the pack download link