SqlCe 3.0: Not Enough Storage Is Available To Complete This Operation.

I'm getting the "out of memory" exception when trying to do various things on a sql mobile [sql mobile 2005] database on a windows mobile 5 device. Our app uses compact framework 2.0 and is written in c#.

Our application uses strongly typed data sets, and save/loads them from a sql mobile database. The error occurs in different places, but always somewhere we interact with the database. It might fail on "DELETE FROM Location" in one run, and on a DataAdapter.Update on another, and a DataAdapter.Fill in another.

The memory thing I can add to the today screen suggests that when I encounter this error there is only 1-2Mb of program memory free [and about 13Mb of storage]. Unfortunately windows mobile 5 doesn't seem to have a way to adjust the allocation between storage/program memory anymore.

The failure has been occuring while trying to import data [which we are loading from a web service, as weakly typed datasets and copying into our specialized ones].

I have implemented:

Using statements, and/or dispose statements on:

Data Adapters

explicitly calling the dispose method on commands used in data adapters: http://support.microsoft.com/kb/824462
Sql Connections
Sql commands [where not used in adapters]
Using/dispose around the larger data sets in the loading process
Gc.Collect() before database interaction [this seemed kind of like a last resort]
Reduction of memory usage [by loading fewer records from the web service at a time]

There does not seem to be a storage memory limitation, a fully loaded database file is about 3Mb. Our test handheld has only 64Mb of memory, and I've seen at most maybe 25Mb free [storage and program combined].

We are opening [and closing] a connection each time we touch the database. How much of a difference will going to a single connection opened when the app starts make?

Any ideas? Perhaps there's something I've missed?

thanks,
-Stair Counter