Upgrade management tool issue with connecting to source environment

Hi All,

I'm trying to copy the objects from the source environment which is BO XI R2 to the destination which is BO 4.0 environment.As soon as I enter the source and destination credentials and click on next I get an error " Communication error occured when trying to connect to server 'BO XI R2 server-name' (FWM 01009)"

I ensured that

1)Machine names and ips are maintained on host files on both the BO Xi R2 server and the client system from where I'm trying to use the Upgrade management tool

2)Windows firewalls are disabled

I tried the following but no luck.

1759336 - "Communication error occurred when trying to connect to server (FWM 01009)" error during client tools login using VPN.

Did anybody face similar issue and manage to overcome?

One more observation here is that the source environment has multiple ip addresses associated with it.Do I need to add any command line parameters to the BO XI R2 servers?If yes,which servers do I need to add?

any help is highly appreciated.

regards,

Sridhar