The reason the Bluetooth printing from mobile devices is taking long from Windows Mobile devices, is due to the fact that the mobile is first searching and then listing all available Bluetooth devices.
To prevent this, the next time an invoice is printed, select the checkbox "Always use this printer".

Should you require to change the printer for some reason follow these steps:

Last Updated
23rd of January, 2012
Business Systems:
Dynamic 3i Edition by Systems Dynamics Corp, Dynamics GP Edition by Microsoft, Enterprise Edition, FACTS Edition, for QuickBooks, Integration Edition
Software Components:
Solid Sales Pro