Unable to connect to application server

Dear all,

I have this kind of problem whenever i try to connect with 2 application server via vpn. At first there is nothing problem about it.But the day after, the problem occured.I cannot access the server at all.

Here is the situation :

I am using vpn to access server A and at the same time accessing server B.Then, the day after, I try to access server B without vpn,then thats the problem occured.Please assist me.Tq

I try to reset my network adapter,unfortunately it couldnt work.