Yeah - you'll have to find out what version of the craxdrt they installed and the version of CR the reports were created in. Reason I keep harping on this is that if the craxdrt is v. 8.5 or less, it will not open reports created in CR version 9 or higher. Personally, I think this is more the issue.
Also, looking at KBA 1217211 and and the issue may be in how the dll is referenced (e.g.; programmer issue). Incorrect runtime install may also be the issue. E.g.; how did IT install the CR runtime? xCopy is not supported, so if that is what they did...
- Ludek