Cannot Modify Encrypted Database without corruption?

[erobar at earthlink.net]

I'm finding that if I encrypt a database (data encryption, not structural), then if I execute any statement that requires write access (e.g. "UPDATE tb1 SET fld1='blah'"), the database ends up being corrupted.  It happens whether I execute the SQL through RealBasic's db.SQLExecute() method or the baseobject's tb.SetBlank, SetString, AddRecord/UpdateRecord methods. 

If I un-encrypt, run the commands, and re-encrypt, then I'm fine -- but I do NOT like leaving the data so exposed.

Anybody else run into this?

many thanks,
Liz