Hello,
I tested this code:
<uc1:CartItemSelector ShowProductOptions="true" id="cartItemSelector" runat="server" SKUID='<%# ValidationHelper.GetInteger(Eval("SKUID"), 0) %>' SKUEnabled='<%# ValidationHelper.GetBoolean(Eval("SKUEnabled"), false) %>' ShowUnitsTextBox="true" />
and it worked correctly.
Could you please test this one without an image button?
If it works the problem could be in the image path.
Best regards,
Helena Grulichova