# Problem with box2d flash game

**URL:** <https://forum.kirupa.com/t/problem-with-box2d-flash-game/325480>\
**Category:** Uncategorized\
**Created:** [October 18, 2011, 2:08pm UTC](https://forum.kirupa.com/t/problem-with-box2d-flash-game/325480 "2011-10-18T14:08:08Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![ab1980](https://avatars.discourse-cdn.com/v4/letter/a/5fc32e/32.png) [@ab1980](https://forum.kirupa.com/u/ab1980)\
**Post date:** [October 18, 2011, 2:08pm UTC](https://forum.kirupa.com/t/problem-with-box2d-flash-game/325480/1 "2011-10-18T14:08:08Z")

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Hi,

I am developing a flash game using box2d ver 2.1a and the game runs perfectly on my computer. But when i upload on FGL a yellow thin vertical line come after about 4000 pixels and then again after about 18000 pixels. Sometimes they don’t come at all. Can anyone tell me why this is happening?

Any help would be great… 🙂

Thanks,