The active sync icon on my JAMin device is greyout and i am not able to change the setting. I have tried everything removed active sync and installed again tried beta 4.5 but is not syncing with my PC i get this error

Unable to establish a connection between the PC and the device. Get up-to-date solutions to common connection problems. Please click the following link:
If ActiveSync Cannot Receive Data Through Port 990
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No additional known issues have been found.
If you are still experiencing problems please send the results to Microsoft to help improve future versions.

Any input would be appreciated i am using the latest arabic ROM version.

I dont mind installed the ROM again but i am not able to do without active sync is there any other way to upgrade the ROM image again.

Thanks in advance.