My app handles calls and sms on all of the series 60 phones apart from the 6630.

SMS Problem
Whenever I receive an SMS, I 'Read' it then delete the sms so that I am taken to the inbox. Now when hold down the menu key to see running programs the application has dissappeared?

Sometimes the icon is still there, so I highlight it and attempt to reopen the app but the icon will then disappear?

Call Problem
If I do the same for a call and receive it then try to get back into the app I will find that the save data becomes corrupted and I am unable to load the saved data. At the very end I receive a symbian message 'Memory full' and the application exits.

Has anyone experience similar problems with the 6630? You would think with a newer phone it would be more reliable than the older models of s60.