not valid - wo und wie ändern?

Hallo!
Habe beim Validation-Service diese Fehlermeldung bekommen:

Zitat

Error Line 295 column 59: document type does not allow element "p" here; missing one of "object", "applet", "map", "iframe", "button", "ins", "del" start-tag.
...soNormal" style="margin: 0cm 0cm 0pt"><font face="Times New Roman" size="3"><The mentioned element is not allowed to appear in the context in which you've placed it; the other mentioned elements are the only ones that are both allowed there and can contain the element mentioned. This might mean that you need a containing element, or possibly that you've forgotten to close a previous element.
One possible cause for this message is that you have attempted to put a block-level element (such as "<p>" or "<table>") inside an inline element (such as "<a>", "<span>", or "<font>").

Ist das wichtig? Wenn ja, wo und wie kann ich das ändern? :confused:
Danke!