Is the URL included in your message your board?
If so, you have removed the UBB powered-by notice from the bottom. This is a violation of the license agreement. Please restore the powered-by notice to its original state.
As for the error you are experiencing - the IMG code can not handle URLs with spaces. Either replace the spaces in the URL with '%20' or do not use spaces.
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Charles Capps
Programmer, Infopop Corporation
Please do not contact me privately for support - post on the board or open a support ticket instead!