Error with RD Gateway "Your computer cannot connect to the remote computer because an error occured on the remote computer that you want to connect to"

we have such configuration:

2  external networks. lan , wifi.

in dmz have 1 server 2008r2 rd gateway , web interface remote apps installed.

in internal network have 1 ts server , 1 ts + session broker both server 2008r2.

remoteapp published wi. using self signed certificates. test (new) farm.

when user try connect form wifi via rd gateway ok.

when user try lan error : "your computer cannot connect remote computer because error occurred on remote computer want connect to. contact network administrator assistance".

but when user click icon second time starts normally.

 

im not network administrator network resp. peoples both network ports opening similar (to gateway 443 gateway inside dns, ldap, kerberos, rdp).

then try decrease security level on rdp protocol rdp , low. , starts work normally.

 

its mystery here second shot user can run application ext. lan network.

can 1 this?

 

many thx. in advance.

can please check event log messages on rd gateway server during error case , post them here in further troubleshooting?

and when second time onwards starts working, means connection fails once 1 user or fails once 1 user every time login web interface?

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thanks, vikash want know more rds: visit http://blogs.msdn.com/rds/default.aspx

Windows Server  >  Remote Desktop Services (Terminal Services)