i've managed to make this graphic viewer program which just opens graphic files ... i sent it to 8 people (friends) to try it out for themselves n tell me what they think of it ... out of the 8 only 3 of them said they had a problem opening the program ... they said that when they tried to open the program it said "unexpected error" n the program never loaded ... y is it that for 5 people it worked n for 3 it didn't?

i made the program in vb5 n all of my friends have the msvbvm50.dll file ... i didn't use any extra controls ... i checked their OS n they have win 98 n win 98 sec ed that can't be the problem because it worked on both OS ... i don't know what file they might be missing because it doesn't tell them that they r missing any files ... furthermore, 1 friend who it doesn't work for has vb5 installed so he should have all the files ...

anybody have any idea to what might be causing this "unexpected error" problem?