M55 + DevMenu - T9 = Phone close (BUZZ)

[ciubex]

I have applied some patches to my phone, M55 fw91.
I increase memory to 3.75MB, by deleting T9, using a patch taked from this forum, it works fine, I used fom this summer.
If I enable Developer menu using IMSI code or using a patch for that version, my phone crash when I try to write using different (when press # into editing field, like SMS Editor, or when renaming file) or when I accesed from Menu > Setup > Display > T9 input > Input language ..... buzz and close the phone.
I use Developer Menu for change Picture quality and I enable using only saved to SIM card.
For moment I have disabled Developer Menu by change location from SIM card with code needed, when I need to make some changes, I change code location to last position, restart phone, make changes into developer menu, change again code location from SIM, restart phone.
This steps annoying me, is a fix patch for that, or what else I must try? To change firmware version?
I like to have more memory available, this means without T9 or others languages only one and have in same time developer menu enabled.
If need more information don't hesitate to request.
Thanks!