Error "Control <name> has no parent window"

I have been previously able to place CGDev JQ components onto my forms. Now when I try to add any of the following components:
TIWCGJQEdit, TIWGCJQButton, TIWCGJQDatePicker, TIWCGJQSlider, TIWCGJQTreeView, and many others, I get the error message:
"Control <name> has no parent window."
Other components, such as:
TIWCGJQLabel, TIWCGJQDialog, TIWCGJQRegion, TIWCGJQCheckBox, TIWCGJQRadioButton and many others, drop onto the form OK.
I can copy and paste an existing label, button, etc. but I can't drop a new one onto the form.
I don't recall doing anything in particular prior to the problem occurring. I have reinstalled IntraWeb and CGDevTools IWJQuery suite and created a brand new Intraweb project but the problem remains.
Anyone have any ideas as to what's gone wrong?
Thanks
IWJQuery Suite 2.4.0.119
IntraWeb 14.0.36
Delphi XE2
TIWCGJQEdit, TIWGCJQButton, TIWCGJQDatePicker, TIWCGJQSlider, TIWCGJQTreeView, and many others, I get the error message:
"Control <name> has no parent window."
Other components, such as:
TIWCGJQLabel, TIWCGJQDialog, TIWCGJQRegion, TIWCGJQCheckBox, TIWCGJQRadioButton and many others, drop onto the form OK.
I can copy and paste an existing label, button, etc. but I can't drop a new one onto the form.
I don't recall doing anything in particular prior to the problem occurring. I have reinstalled IntraWeb and CGDevTools IWJQuery suite and created a brand new Intraweb project but the problem remains.
Anyone have any ideas as to what's gone wrong?
Thanks
IWJQuery Suite 2.4.0.119
IntraWeb 14.0.36
Delphi XE2