Demos Locks Up

[DiggerWertz]

I downloaded and installed Hoster and MicroStudio Demos to try out on my new laptop. I knew the internal CD drive was not going to be compatible, so I hooked up my Plextor Premium USB drive, which works perfectly with both programs on my desktop. Both programs lockup when trying to read from this drive and the status in tash manager becomes "not responding". Media player and other programs work fine with the external drive. Is this problem only with the demo and external drives? I need to know before I purchase another copy of both only to find I have the same problem.