Hi,

There is a log file associated with SSRS that will tell you what the problems are starting the service etc. mine is located here:

C:\Program Files\Microsoft SQL Server\MSRS10_50.SQLEXPRESS\Reporting Services\LogFiles

Yours will likely be located in a similar path but won't be that exact one... if you're still having trouble once you've looked at that log then post back with the errors and maybe we can help.

Thanks,

Simon