File I Sent NOt working

hi - I just sent a file to a freind. And he sayts it says Read ONly at top. The problem is the cells that have formulas do not work. I have sent this file many times and never had this problem. NOt sure why he can not see the data. He says the cells have #### in them. I told him to expand the width but he stil havs errors. He sent the file back to me and it also says read only but I can see and update the cells on my end.

Can't figure this one out???

MY friend just called and said he doesnt have the analysis addin installed, I think this may be the problem. I do remember now when I asked a question about this last week, someone said to use the addin - I already had this addin installed installed I guess because it worked immediatley on my pc.
He tried to run the add in but it said to install it (and he does not have the disk).

So, I need to give him a disk with it or find a new way to round to the nearest .25.

HELP!!!!!

=ROUND(A1/4, 0) * 4

If I do this
round(.51/4,0)*4, I do not get an answer. I was hoping to get .50
I was hoping to get to the nearest .25. ????

If the value was .10, I will use the ceiling function, because if I have a value over .10 then I want to go up to .25, but all other values above .25 should go to the nearest .25. I will use and if statement if the value is below .25 THEN USE the ceiling and if above then use the round or mround.

Sorry, Danielle, typing too fast. I meant =ROUND(A1 * 4, 0) / 4.

NBVC got the equivalent right -- the first time