Paypal API Request Fails

Dears
I Have website hosted under windows value plan
i have integration with paypal payment throw Paypal .Net API
the problem is that request generated by paypal DLL is blocked and returning error every time .
am sure that code has no problem as i have same module running on other hosts

any help plz

Kindly open a support ticket with all details and also mention links, we will check it.

i did and that was the reply
Can you please let us know the steps by which we can replicate issue.
Without steps we are unable to reproduce issue.

if i know the solution they why am openning a ticket ?!!!!

am using pure .net API
it works fine on godaddy host with option full trust
i mention godaddy here only to verify that code is fine and has no problems
dlls used

PayPalCoreSDK.dll
RestApiSDK.dll
Newtonsoft.Json.dll
log4net.dll
am following up with support using tickets and we didnt reach any solution
note:
it was working previously after modifying directory settings to allow script and executables
but it stopped days ago

https://api.paypal.com/v1/

BCM-37140-506
thats the ticket
error msg
Cannot close stream until all bytes are written.
i think it some thing related to blocking request

i give them url and port and still no thing useful