I have researched this and when I came to this conclusion, I changed from the 8800 to the 8310. The sofware your using (188.8.131.52) doesn't support the transfer. The BT support you need works with 4.2.2 ... and later OS. I switched phones thinking the A2DP/AVX-fer profile now in the 8310 software would do it all.
Nope! The text messaging feature with Sync is not supported on the Curve.
Good luck, I hope I have told you correctly as I really reasearched it.