6210-6250 chnge sms tone..

i want to upgrade 6210-6250 but before i uploaded the mcu-ppm
i modify it first to chnge the message alert tone using flashtone. but the poblem is after i upload the modified mcu-ppm of 6250 it cnt find network because logger cant read the phone data and sometimes reading but it tells me that "the reason of contact service is: blahhh blahh blahh it gives all diagnosis (test failed).
anyone knows how to solve this problem..??// help//:confused:

try to use ppm manager to caculate ppm crcs after using flashtone, it works for me.

:D