Regular expressions send different result in Visual Studio 2010 and Visual Studio 2008

[BadJerry]

The following code returns isMatch true in VS 2008 not in VS 2010

CString strPattern = \_T("(\\\\+|00)\\\\s\*\\\\d{2}(\\\\s?\\\\d{3}){2}\\\\s?\\\\d{4}");
CString strValue = \_T("0044 207 689 0000");
CT2CA pszFind(strPattern);
const std::tr1::regex pattern(pszFind ,std::tr1::regex\_constants::nosubs | std::tr1::regex\_constants::ECMAScript);

CT2CA pszData(strValue);
std::string strSearch(pszData);

isMatch = regex\_search(strSearch.begin(), strSearch.end(), pattern);

Any idea why? Thanks in advance