Cell is converting my numbers from floating to integers... Help?

Im having a new trouble regarding the same question: I just finished my work and gave it to my boss, he placed it in his computer to find out that my textboxes were taking a float number from a cell and showing the whole number as an integer, which is a really bad problem since what should be $413,45 ends up being $413.457.342.638.132,00. The number changes depending on the user's choices, so I can't just put a constant. What's strange is that it works perfectly in my computer, but it's messy on his! This means that the error is not on the code but on his pc configuration. I have my boss' computer here, looking for anything that may make sense to me, but I'm not sure what could lead to this problem.

Also, I already tried the solution above, but doesn't work this time. Im pretty sure it has to be with my boss' computer configuration since I have no errors in my computer neither my sister's.
Thanks a lot