Filter Issue

I have a report in Nav 2013 R2, created on Employee table, when i run the report for a single employee, it runs fine.
But when i try to provide the filter as No. = 1..50, it isn't taking the filter, infact i have tried the filter with Pipe sign (1|2|3|4|5)

The same i tried on the employee list page, it also isn't working.

Any suggestions