thanks for the reply, shinu.
tried replacing the current css that deals with the changing of the text color when you hover over the link, with what you've provided and the text doesn't change colour at all.
i then tried adding what you've provided so that it works with what i currently had and that too doesn't change the text colour at all.
i have found that if i replace this (which is from my original code)
div.RadMenu .rmItem:hover .rmText
/*font colour when hovering over*/
.RadMenu_Default .rmGroup .rmItem:hover .rmText
although the Main Tabs dont have their text change colour on hover anymore, the sub tabs do. i can't work out whether setting the Main Tabs Hover overrides the setting for the Sub Tabs.