Having problem with MOV files and Catalyst

Hi.. I am having pretty lame problem with catalyst and I think problem is in content like I play 10 videos on catalyst and when 5th video starts it simply drop out and catalyst software turns off.. its pretty much same as DL.3 when content is wrong DL.3 simply die but here just kick out of soft.. so I would like to know is there any way to check are there any prblems with MOV files or that could be problem with Self catalyst soft???