Media Lab Custom Item Crash

I've created a custom item that has Flash embeded in HTML. When the participant compeletes the task the flash scripting passes the varibles to medialab just like a form does (be appending the varibles on the end of the url e.g. C:/file.html?score=343) . Everything works fine and Medialab recieves the variable and moves on the to the next slide. However if I run the experiment again, Medialab crashes as soon as the Flash form submits. I've found that if I close Medialab and restart it before running the experiment again this doesn't happen and it works correctly. Any Ideas on whats going on here or am I just going to have to restart the program between participants?

Here is the error code:
AppName: medialab.exe AppVer: 2006.2.0.39 ModName: ieframe.dll
ModVer: 7.0.6000.16791 Offset: 000eae9c

Thanks

I know we made quite a few changes between the 2006 and 2008 versions in terms of how custom items are handled. Can you test the 2008 version on one of your machines and see if that resolves it? Does the same result happen if you try other custom items?