iPhone 3G springboard constantly crashes

[smashmouthftball]

Firmware 4.2.1
Modem firmware 05.13.04

I have an older iPhone 3G jailbroken with pwnagetool and unlocked with ultrasnow...I installed ultrasnow and androidlockxt and springboard crashes like 5 times a day...any ideas why/suggestions to fix? Thanks for your help

[iYeow]

Start uninstalling from the last apps that you install from Cydia or do a restore and jailbreak again