Biztalk 2010 - There was a failure executing the receive pipeline: ... Please verify that the pipeline strong name is correct and that the pipeline assembly is in the GAC.

There was a failure executing the receive pipeline: "Xxxxxx.ESB.MDS.Pipelines.FaultReceive, Xxxxxx.ESB.MDS.Pipelines, Version=1.0.0.0, Culture=neutral, PublicKeyToken=bdf14cc2788cc602" Source: "Unknown " Receive Port: "Xxxxxx.ESB.MDS.Fault.Resubmit" URI: "/Xxxxxx.ESB.MDS.Resubmit/BTSHttpReceive.dll?PollingID=MDSIgnore" Reason: Failed to get pipeline: Xxxxxx.ESB.MDS.Pipelines.FaultReceive, Xxxxxx.ESB.MDS.Pipelines, Version=1.0.0.0, Culture=neutral, PublicKeyToken=bdf14cc2788cc602. Please verify that the pipeline strong name is correct and that the pipeline assembly is in the GAC.

I receive the above error while trying to submit a message to a receive location. I have tried all the suggested solutions..

• restarted the host instance
• my app pool is running on 4.0

Below is the log from fusionlog viewer

*** Assembly Binder Log Entry  (1/22/2013 @ 4:34:16 PM) ***

The operation failed.
Bind result: hr = 0x80070002. The system cannot find the file specified.

Assembly manager loaded from:  C:\Windows\Microsoft.NET\Framework\v2.0.50727\mscorwks.dll
Running under executable  C:\Windows\SysWOW64\inetsrv\w3wp.exe
--- A detailed error log follows. 

=== Pre-bind state information ===
LOG: User = XXX\btdevsvc1
LOG: DisplayName = xxxxxxx.ESB.MDS.Pipelines, Version=1.0.0.0, Culture=neutral, PublicKeyToken=bdf14cc2788cc602
 (Fully-specified)
LOG: Appbase = file:///C:/Windows/SysWOW64/inetsrv/
LOG: Initial PrivatePath = NULL
LOG: Dynamic Base = NULL
LOG: Cache Base = NULL
LOG: AppName = w3wp.exe
Calling assembly : (Unknown).
===
LOG: This bind starts in default load context.
LOG: No application configuration file found.
LOG: Using host configuration file: C:\Windows\Microsoft.NET\Framework\v4.0.30319\Aspnet.config
LOG: Using machine configuration file from C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\machine.config.
LOG: Post-policy reference: Revlon.ESB.MDS.Pipelines, Version=1.0.0.0, Culture=neutral, PublicKeyToken=bdf14cc2788cc602
LOG: GAC Lookup was unsuccessful.
LOG: Attempting download of new URL file:///C:/Windows/SysWOW64/inetsrv/Revlon.ESB.MDS.Pipelines.DLL.
LOG: Attempting download of new URL file:///C:/Windows/SysWOW64/inetsrv/Revlon.ESB.MDS.Pipelines/Revlon.ESB.MDS.Pipelines.DLL.
LOG: Attempting download of new URL file:///C:/Windows/SysWOW64/inetsrv/Revlon.ESB.MDS.Pipelines.EXE.
LOG: Attempting download of new URL file:///C:/Windows/SysWOW64/inetsrv/Revlon.ESB.MDS.Pipelines/Revlon.ESB.MDS.Pipelines.EXE.
LOG: All probing URLs attempted and failed.
I have been trying to fix this for quite sometime now without any luck :(