MX 5500 keyboard, I'd strangle myself with the cord if it had one

[gOATS]

I recently recieved a MX 5500 bluetooth keyboard and mouse combo from a friend, I'm using a Rocketfish bluetooth adaptor (its bluetooth 2.0 with latest WIDDCOM drivers installed)
I installed the drivers, setpoint and then went to the bluetooth icon on my taskbar and added both devices, I was able to have the mouse added with no passkey, but the keyboard wouldn't let me do that, so I let the computer pick a passkey, it did so then prompted me to type it in on the keyboard, while displaying a passkey entry screen on the LCD. It worked fine for a day, then I lost the connection, figuring the easiest fix was to unpair and repair it, I deleted it from the bluetooth menu and then went to add it again. I let it pick a passkey but this time it goes right to a passkey exchange failed screen instead.
I can get it to connect to another computer running xp by disabling the passkey, however that computer also will not allow me to enter a passkey anymore, if I do I get the same error message. which makes me suspect the keyboard itself has the issue.



So my questions are as follows:
What can I do to reset the passkey so the keyboard will once again let me type it in, all I want is for it to accept a new passkey and work. It seems to me like the keyboard is remembering a passkey and refusing any new pairings until it gets it.

If I cant do that, is there anywhere to find out the passkeys value?

Failing that, what can I do to vista to make it run without a passkey.

I'm beyond infuriated at the moment, I've spent 4 hours on the phone with logitechs tech support and got nowhere, reinstalled and uninstalled everything bluetooth and logitech related at least 5 times. And rebooted at least 40.

I've tried pulling the batteries from the keyboard and typing on it to drain the capacitors, connecting it anyway I can think of etc.
I'm truly out of ideas.
I'm running vista ultimate 32bit, with a ASUS motherboard, AMD chip and 4 gb of ram


EDIT: Logitech Setpoint also discovers the mouse and keyboard, but when the keyboard is supposed to connect it says connecting.. and the software says it found the keyboard, then puts me back to the first step again.