Erro no FOR XML PATH

Estou com o seguinte problema qdo vou usar concatenação com FOR XML PATH...

Msg 6841, Level 16, State 1, Line 2
FOR XML could not serialize the data for node 'text()' because it contains a character (0x001F) which is not allowed in XML. To retrieve this data using FOR XML, convert it to binary, varbinary or image data type and use the BINARY BASE64 directive.

O que devo fazer???