Unable to RDP on to Jump Server

Microsoft has recommends following solutions:

http://support.microsoft.com/kb/951037/en-us

Solution :
The following actions solved the problem in our case.
1) Configure TCP Chimney Offload in the operating system
• To disable TCP Chimney Offload, follow these steps:
a. Use administrative credentials to open a command prompt.
b. At the command prompt, type the following command, and then press ENTER:
netsh int tcp set global chimney=disabled
2) Configure TCP Chimney Offload on the network adapter
• To determine the current status of TCP Chimney Offload, follow these steps:
a. Use administrative credentials to open a command prompt.
b. At the command prompt, type the following command, and then press ENTER:
netsh int tcp show global
• To determine the current status of TCP Chimney Offload, follow these steps:
a. Use administrative credentials to open a command prompt.
b. At the command prompt, type the following command, and then press ENTER:
netsh int tcp show global
3) Disable RSS in Windows Server 2008 R2
• To disable RSS, follow these steps:
1. Use administrative credentials to open a command prompt.
2. At the command prompt, type the following command, and then press ENTER:
netsh int tcp set global rss=disabled
• To determine the current status of RSS, follow these steps:
a. Use administrative credentials to open a command prompt.
b. At the command prompt, type the following command, and then press ENTER:
netsh int tcp show global

4) Disable NetDMA in Windows Server 2008 R2
• To disable NetDMA, follow these steps:
1. Click Start, click Run, type regedit, and then click OK.
2. Locate the following registry subkey, and then click it:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
3. Double-click the EnableTCPA registry entry.
Note If this registry entry does not exist, right-click Parameters, point to New, click DWORD Value, type EnableTCPA, and then press ENTER.
4. To enable NetDMA, type 1 in the Value data box, and then click OK.
5. To disable NetDMA, type 0 in the Value data box, and then click OK.
6. If the EnableTCPA registry entry does not exist, enable the NetDMA functionality.