and it is a EZ-B Version 3.1a

The connection is timing out, which means that the PC is not seeing the EZ-B.

Is the red light on the bluetooth module flashing when you try connecting? Is the EZ-B receiving enough power? Check batteries or try on a bench supply.

Is a third party bluetooth stack being used, or third part bluetooth software. Check you are using the correct COM port.

It might pay to check if the EZ-B is detected by another device if the red light is flashing. While it's not usable you could always turn on bluetooth on your phone and search for devices to see if it can find the EZ-B, that could rule out the PC being the problem.

Rich.

First, he said he tried to connect to it on 2 different pc's. Second, he said it connects for a few seconds then disconnects(going by the Bluetooth light)

i got the usb bluetooth for the shop. like the on on this site, and i have used my bench top power supply set at 9v. still same thing, i can see the ez-b with my galaxy S2. hmmm. i dont know. and i have done it all, reset, uninstall, re install and i am about to formatt and re install windows 7 on my laptop. my desk top is windows 7. and my girlfriends laptop is windows vista. same thing.

yea, that is what it is doing, it will connects for a few seconds then disconnects(going by the Bluetooth light). i can do it. every thing looks and acts as it did when it was working, lights do the same thing, it just seem to disconnects.

If it is connecting then disconnecting after a few seconds check your power supply is good enough, it could be a brownout causing it. What do you have plugged in? How many amps is the supply? If you have a high torque servo connected that can pull 3A but your power supply is only 1A it will brown out and disconnect. Also, if your accessories total is more than the regulators can handle (5A from memory) it will brown out.

If the power supply is good then;

Unplug everything from the EZ-B. Connect the EZ-B to the PC Does it disconnect?

Plug in a servo to any of the Digital ports Add a servo control Move the servo Does it disconnect?

Plug in another accessory Add the control & use it Does it disconnect?

Repeat until everything is connected back to the EZ-B or until the disconnect happens.

If the disconnect happens then check the accessory which was last connected.

It is a 15 amp desktop power supply. And the amp meter is reading next to noting with just the ez-b. And still. Like I have said before. It not connect for a sec. Then it will disconnect . Lights still flash. Like it should work.

Try removing the bluetooth chip from the EZ-B then check that all 4 pins are straight, use a small pocket knife blade and lightly scrape the 4 metal prongs sticking down from the Bluetooth then re-insert and test.