@sars, I don't know if I was the only one you've PMed the exazct copy of your post but I assure you that it was not necessary. In fact, most people find unsolicited PMs intrusive and, as a consequence, may be less likely to respond to you.

Regarding your problem, which "memory" is at 57 MB of free space? Your phone will give you two or three figures, depending on whether you have an SD card installed: MyDocs, the SD card and "memory for installable applications". If it is the last one, then you may have a serious problem.

Start by pasting the output of
typed in the terminal and we can take it from there.