K800 de-branding Problem.

hi all.

i've de-branded my 53 cid k800i a couple of months back but i'm having some problems with it.

most of the time (not every time) when i enter the Menu it says "the Menu.ml is not readable, this may make the menu unusable." (something like that.)

also, i can't save Drafts Messages. they save for about 10 minutes. i come back later and there not there.

also i can't connect my phone to WINDOWS 7 without Sony ericsson pc suite.

shall i just re-flash my phone or is there separate fixes?