Try to update you OS
Go here
https://www.blackberry.com/Downloads...05D7C424EBAE5F
Then select 7230 from the drop down. Then select the first Download link... Should show:
Software For BlackBerry 7230 Wireless Handheld(TM)
BlackBerry Handheld Software v4.0.2.49
Package Version: 4.0.2.49
Consisting of:
* Applications: 4.0.2.35
* Software Platform: 1.6.1.51
* File name: 7200M_PBr4.0.2_rel49_PL1.6.1.51_A4.0.2.35_Vodafone .exe
* File size: 32.5 MB
* Date posted: 09-Jan-06
Note: The Software Platform and Applications version numbers can be found under Options-About screen on the handheld.
That is the most recent OS for your device AFAIK.
To install the OS, follow these steps :
http://www.blackberryfaq.com/index.p..._BlackBerry%3F
Then try method 2 of the FAQ that rambo posted.