Locking Up After SQL Server Mobile Merge Replication

Hi ,
I would like to get your advice in an issue that I am facing regarding merge replication.
The flow is like:
1) User enter his login name and password.
2) Host_name is set as the login name that the user enters.
3) Based on the HOST_NAME property after filtering user gets the records relevent only to him
(Differnet subscriber may use same mobile device).

4) He make some changes in the local sdf according to the business logic.
5) The application Syncs with server on the next login session.

My issue is when I am trying to run the application in emulator exactly at the sdf updating part the application terminates.
Error mess: Connection to Remote Device has been lost.....
If I execute the same sql insert query it works om the local sdf and master database.
Emulator used where Pocket PC 2003 SE and Windows Mobile 6 classic emulator.
I have installed 1) Visual Studio 2005 SP 1 2) net compact framework SP2.

When I comment all the code related to Sync ,application works witout any issue.
And the same application works in my "I mate kjam".

The code that I use is given below:
==========================================================================

public void Sync(string hostname, int newsub) // Parameters for HOSTNAME and flag to denote new user or existing //user.

{

SqlCeReplication repl = new SqlCeReplication();

repl.InternetUrl = @"http://231.000.000.211/Merge/sqlcesa30.dll";

repl.Publisher = @"SERVER";

repl.PublisherDatabase = @"Merge";

repl.PublisherSecurityMode = SecurityType.DBAuthentication;

repl.PublisherLogin = @"sa";

repl.PublisherPassword = @"password";

repl.Publication = @"Merge";

repl.Subscriber = @"MergeSub";

repl.HostName = hostname;







repl.SubscriberConnectionString = @"Data Source=""Program FilesMerge.sdf"";Max Database Size=128;Default Lock Escalation =100;";





try

{

if (newsub == 0)

{

if (File.Exists(@"Program FilesMerge.sdf"))

{

File.Delete(@"Program FilesMerge.sdf");

}



repl.AddSubscription(AddOption.CreateDatabase);

repl.Synchronize();

repl.Dispose();

MessageBox.Show("newuser sync Done");

}

else

{

if (!File.Exists(@"Program FilesMerge.sdf"))

{

repl.AddSubscription(AddOption.CreateDatabase);

repl.Synchronize();

repl.Dispose();

MessageBox.Show("FirstSync Done");

}

else

{

repl.Synchronize();

repl.Dispose();

MessageBox.Show("SameuserSync Done");

}

}

=================================================================================
Please advise......