Focus 1.8 Tddi Wont Start After Recon Alternator Fitted

[rikforbes]

hi iv recently bought a 2001 focus 1.8 tddi it was running fine till the other day when driving home the battery light come on I tried to start it the day after but the battery was flat I called the AA and they said it was the alternator, so I went and got a recon and fitted it. All good but when I charged the battery up and put it on it wouldn't start it just turns over.

I recalled the AA out and they tried bleeding the fuel system didn't work he tested the glow plug they worked fine also the immobiliser light goes out so its not that.

he said he couldn't repair it and didn't know what was wrong

I know the pump is ok because before the alternator was fitted it would start fine with jump leads

so please if any one has any idea please please help