a4 wont start, please help

[rokit]

Hi all, I recharged my battery on my 96 a4 an accidentally connected it the wrong way round because I was in a hurry, It was only connected for a few secs but now I cant start the car.
When I turn the key there is 1 click but then nothing, tried jumpleads and still the same.
What am I likely to have Broke? looked at fuses but couldnt see any blown

 

[bahnstorm.net]

check ignition relays

 

[Markey]

Your have proably blown fuses check them.

 

[rokit]

I've checked the fuses inside the dash where the door closes, theyre all ok, is there any more i can check? Going to try a new batt. tomorrow but want to eliminate as much as I can

 

[Broken Byzan]

Is the ECU immo key icon still coming on the dash?

If not , gulp !!!!!

ECU could be fried

 

[rokit]

Never really checked but I didnt notice any new icons or ones that had gone that once were there