CAT2 - Personnel Number Management

I get the following problem when we execute the Tcode CAT2.

When I execute transaction CAT2 the field "Personnel Number" takes the

value in user-parameter "PER". This field is only displayed ( I set in

Customizing the status field as displayed only) because every worker hasto insert his timesheet for himself.

This works excepts in the following scenario:

When user executes another transaction, for example, PA30 and displays

another CID (personnel Number) and then he executes CAT2 the field

displays the last management CID displayed, thus it doesn't take the CIDinto the parameter "PER"

Could you help us to solve this problem?

Many thanks,

Vanesa Callejo