When the E72 doesn’t work like it should you should consider to reset the phone. Menu get stuck, applications doesn’t work, etc’ also sign that it’s time to reset the phone.
Also after upgrading the phone firmware it’s good idea to reset the phone.

There are two types of reset, Hard reset and Soft reset.

Soft reset – Doesn’t involves deletion of user data (Contacts, SMS, etc’) . Type *#7780# from the standby screen. The Default security code is 12345.

Hard rest- Erase all phone content but usually works better in solving problems. Also recommended after  phone firmware upgrade .
Type *#7370# from the standby screen. The Default security code is 12345.