IpfcXToolkitGeneralError and IpfcXToolkitCantModify

hi, all

i am working on proe 5.0 with  VB API, and my app works in my computer,

but now i have to change another computer, so copied my works to it.

when i run it, it always throw an exception when connecting existed proe or start new proe.

the exception is IpfcXToolkitGeneralError or IpfcXToolkitCantModify.there is one time throws IpfcXToolkitFound.

anyone knows what exactly cause this? how to make it correct?

PS: proe installed correctly, system environments setted correctly, vb_api_register registed.

thanks so much.