Help!? Immobiler activated when I put key in ignition!

[sveed1.8T]

I was trying to fix the needle on my tachometer, so I disconnected the cluster, took the plastic housing away (so that it was easier to get to) then reconnected the cluster. After tweaking the needle a but, I thought I'd check to see if it would now work..

As I put the keys in the ignition, one click before engine start, it went as follows:
BEEP, check brake pads, BEEP, Immobiliser activated, BEEP, check wash fluid, then shows mpg and temperature. The EPC light flashes throughout!

WTF is going on?! My pads are new, my fluid is topped up, n I've never had running issues of ECU problems!

Also, as the the immobiliser is activated, as soon as the engine starts up, it cuts out! I've already been out and about in the car this morning, without any issues or warning lights!!

Please help a fellow dubber in need!

[sveed1.8T]

Update:

Disconnected and reconnected the cluster a couple times, it's now saying airbag fault, but no epc light or immobiliser warning! The car started no probs? These machines confuse me!

On a positive note, the tachometer needle now works!

Next question, how do I get rid of the airbag fault warning, vagcom?

[old_n07]

Yes, the only way to clear the airbag fault (which you got by having the ignition on with cluster out) is to use a scanning tool such as VCDS

Neil

[sveed1.8T]

Cheers! 

Had a quick search on here n found a link to this:
http://wap.ebay.co.uk/Pages/ViewItem.aspx?aid=160546433564&emvcc=0

Would this do the job? Don't want to waste my pennies if it's a load of poo!