Are you loading an external page in the RadWindow or are you using its ContentTemplate? I cannot be certain what your exact scenario, logic and problem may be, but here follows a list with suggestions you should try:
If you are loading an external page please make sure you pass correct parameters to it (e.g. via a querystring
). You should also make sure that the proper data is returned from your server (i.e. if the query is correct).
In case you are using the ContentTemplate and AJAX the above still applies, but you should also check your AJAX settings - is the grid updated after a click on the second button, not only from the first? Have you placed your update panels properly, as advised in this help article
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