easy control data value question

I have a report which has on it a text box
when I enter the data value for the control as ProjectName it works fine
when I enter the data value for the control as CurrentIssueTitle it works
fine
(both are in the report's data source)

however, when I enter:
= [ProjectName] & chr(13) & chr(10) & [CurrentIssueTitle] the result is
an #error#
even if I simply enter:
= [ProjectName] & [CurrentIssueTitle] the result is an #error# it's
still an error


any suggestions would be greatly appreciated in advance,
Mark
....learning something new every day