Yes. Make sure that your products have valid weights and dimensions.
My randomly chosen test product Bookmark - Fire Nymph Beaded apparently weighs nothing. It's not possible to provide a quote for such items.
Also check that you aren't 'hiding' the only valid shipping methods possible. For example, if I assume you add a weight to the bookmark above (lets say its 10grams) and the dimensions are entered as being 3 x 6 x 0.1 (cm) this item would be classed as suitable for letter rates. If you have opted to not allow letter rates as a valid method AND you have set the option 'Hide Parcel Rates if letter sized' there will no longer be any valid quotes for the module to display, which will cause it to revert to using the 'static' rates.
If entering valid weights/dimensions doesn't solve the problem please provide a link to the product(s) that you are using for test purposes as this will allow me to see what is being sent to the servers and I'll probably be able to offer other suggestions. It's not much good letting me select products at random because I'll always manage to select the one product in the store that doesn't fit the symptoms.. for example, the bookmark I selected above may well be the *only* product in your store that *doesn't* have any weight defined for it, which means I could already be way off the mark.
Cheers
Rod
Bookmarks