for some reason I get and error with the first + sign

BULK INSERT CommentsBreakPointTemp
FROM '\\pinnaclereport\scheduleimport\' + @SchoolId + '\' + @SchoolId + 'comments.csv' --< Change this line
WITH (FIELDTERMINATOR = '|');


Msg 102, Level 15, State 1, Line 40
Incorrect syntax near '+'.


any ideas?