> AFTER RUNNING THE THE SLON PROCESS GIVE FOLLOWING
> MASSAGE:
>
> 2006-12-12 14:56:00 IST DEBUG1 copy_set 1
> 2006-12-12 14:56:00 IST DEBUG4 version for
> "dbname=qsweb host=172.18.5.141 user=postgres password
> = postgres" is 80200
> 2006-12-12 14:56:00 IST DEBUG1 remoteWorkerThread_1:
> connected to provider DB
> 2006-12-12 14:56:00 IST WARN   remoteWorkerThread_1:
> transactions earlier than XID 24697 are still in
> progress
> 2006-12-12 14:56:00 IST WARN   remoteWorkerThread_1:
> data copy for set 1 failed - sleep 60 seconds

This is normal behaviour, documented in the admin guide in the FAQ. 
<http://linuxdatabases.info/info/faq.html>

Slony-I cannot start replicating anything until all the transactions
earlier than XID 24697 have completed.

You'll just have to wait until they complete.