Assignments - cannot see student names?

hi, im new to using v2.5.1

ive created a simple assignment, with instruction, and the student need to upload a file.

when i look at the 'view/grade submission', 2 things..

a. i dont see any names of the students, only 'participant 88' and such.

b. also, im not using the gradebook in moodle, as yet, so how can io turn off the grading portion?

i tried to look at the assignment, editing it, and i didnt see any options... but i do need to see their names..

thanks all