Problems with a report not referencing a custom field value

When I try to use a statement given to me in this forum i'm getting an error when the report runs

My intention in the report is to print out the user associated with a requirement.  The user's name is stored in a custom list field CUSTOM_01.

I'm trying to get the report to print out the user name NOT the id of the user in the dropdown list.

This is the statement i was told to use but it is causing an error

<td><xsl:value-of select="Requirement/CustomProperties/CustomProperty[PropertyNumber="1"]/Value"></td

Please wait while your report is generated...

Name cannot begin with the '1' character, hexadecimal value 0x31. Line 18, position 90.