5.0 upgraded to 2.3.5 can't connect via USB

[sbh]

I have the YP-G70 sold by woot.com. I used Odin to flash the rom found at http://hotfile.com/dl/132485810/b9ac...XXKPF.rar.html

Seems to work fine most of the time, except that it runs sluggish occasionally, Wifi stops working and won't resume until a restart, and the USB connection never works.

I'd like to reinstall the factory firmware, but can't get it to connect to my PC via USB. It won't work in Kies mode or USB mode.

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