Exporting HTML error

[charliescoffee]

I'm exporting a web page in HTML but get an error message:

"Failed to export to C:\Documents and Settings\ . . . [page name].htm_files\484png. The file may be locked or open in another application."

I get this error message twice, the first time it's for a png graphic in the page file folder (as quoted above) and when I "O.K." this I get a second which is the same but for the HTML page (ending in: "C:\Documents and Settings\. . . [page name].htm). Any idea what this is all about?