Recently released Resident Evil 6 on PC, I bought it in the Steam market for 599 rubles on the day to download it from Steam, but when trying to run - load was too long (10 minutes), everything would be fine, but the Co-op mode will not start, or rather we go in a group, with chapters and after watching the intro movies game disconect me, is still trying to connect to the game - the result is negative. In what could be the problem?

Specifications of my laptop:
Windows Se7en (Licensed Home Basic) 64-bit

Processor: Intel (R) Core (TM) i5 CPU M 460 @ 2,53 GHz 2,53 GHz
Memory: 4GB (Available 3.8Gb)
Experience Index Processor: 6.8
Video Card: ATI Mobility Radeon HD 5650 1GB RAM