Web Service XML Changes Return Table Field Names

Question

I am writing a Web service to return a employee information from SAP using .Net Connector. My Webservice XML changes return table column names with few escape characters. Does anyone know why this happens? and How to prevent it?
Every column name is changed: e.g. PERS_NO to PERS_--5fNO
NCo -> 2.0
RFC- > Custom Function module
RFC Return Type -> ZFPSYNC
VS.Net -> VS Studio 2003, ( C# Web service)
Here is part of XML document:
  <?xml version="1.0" encoding="utf-8" ?>
- <ArrayOfZFPSYNC xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://tempuri.org/">
- <ZFPSYNC>
  <PERS_5fNO>00100001</PERS_5fNO>
  <PDS_5fEMPID>00054740</PDS_5fEMPID>
  <SSN>001380261</SSN>
  <NAME_--5fPFX />
  <FIRST_5fNAME>Tuesday</FIRST_5fNAME>
  <LAST_5fNAME>October</LAST_5fNAME>
  <NAME_--5fSFX />
  <PRIOR_5fNAME>Tuesday October</PRIOR_5fNAME>
  <NICKNAME />
  <CO_5fCODE>TAX</CO_5fCODE>
  <CO_5fCODE_5fT>Tax LLP</CO_5fCODE_5fT>
  <CO_5fCTRY>US</CO_5fCTRY>
  <ORG_5fUNIT>50191687</ORG_5fUNIT>
  <ORG_5fUNIT_5fT>Northeast Region Lead Tax</ORG_5fUNIT_5fT>
  <EE_5fLEVEL>C1</EE_5fLEVEL>
  <EE_5fLEVEL_5fT>Firm Director</EE_5fLEVEL_5fT>
  <SRV_5fAREA>TAX</SRV_5fAREA>
  <SRV_5fAREA_5fT>Tax</SRV_5fAREA_5fT>
  <JOB_5fFAM>CS-TAX</JOB_5fFAM>
  <JOB_5fFAM_5fT>CS - Tax</JOB_5fFAM_5fT>
  <PER_5fAREA>BOSX</PER_5fAREA>
  <PER_5fAREA_5fT>Boston-Berkeley St-TAX</PER_5fAREA_5fT>
  <PER_5fADDR>200 Berkeley Street</PER_5fADDR>

Answer 1

Please install patch from OSS note 506603. This should correct the problem.