Issue with Custom Pipeline component

Hi,

I developed a custom  general pipeline component for logging the message at pipeline. I am getting an error whenever I use that pipeline. The error is as follows.

There was a failure executing the receive pipeline:
"PipelineOrch.LogPipeline, PipelineOrch, Version=1.0.0.0,
Culture=neutral, PublicKeyToken=9bd9cd7a0ff32cad" Source: "Unknown "
Receive Port: "RP_InPipeline" URI:
"/proj/http/BTSHttpReceive_rtm.dll" Reason: Access to the temp
directory is denied.  Identity 'KLP\btsIsolatedHost' under which
XmlSerializer is running does not have sufficient permission to access
the temp directory.  CodeDom will use the user account the process is
using to do the compilation, so if the user doesnt have access to
system temp directory, you will not be able to compile.  Use
Path.GetTempPath() API to find out the temp directory location.

I tried GetTempPath() API, it is showing a temp dir other than C:\windows\temp. I gave all access to isolated host for that temp dir, still it is showing same error. I tried with default XMLDisassembler component , that too shows the same error. Please help me to solve this issue..