Userforms - To populate data on a specific sheet and columns

Hi All, i'm having a hard time with trying to populate data from a userform to a specific column under a specific sheet. I've attached the file if you want to look at it. The file is basically a exam type with user logging and auto score computing.

The file is made of 6 sheets, 1st sheet is the log-in page where takers are required to enter their ID number and last name. 3 sheets of dummy test items, an Admin sheet that computes the score per test item and Database which I'm trying to compile all data in one column.

What I'm trying to do is that when they enter their ID and Last Name and then answer the 3 tests, they will be recorded in the database sheet in 1 column containg their ID, name and all the test results so that checking,grading and identifying who took the test would be easy.

So far I think I've done the part for the scores but I can't seem to get the userform for emp# and last name to populate on the field marked in the database.

Please help...