It working if click at the below of "select" button.sorry for my bad english explain
I attach picture for more information for this case.
Thanks
Telerik.Web.UI_2011_2_915_Dev
This is my RadEditor Configuration with transparent background and Menu Top
<telerik:RadEditor Runat="server" id="FCKeditorThai" Width="100%"
AutoResizeHeight="true" AllowScripts="True" EnableResize="false"
BorderStyle="None" Visible="false" OnClientPasteHtml="OnClientPasteHtml"
ToolbarMode="PageTop" onclientload="OnClientLoadEdit"
ToolsFile="~/upload/toolFile.xml" Skin="Office2010Blue" >
<ExportSettings OpenInNewWindow="True">
</ExportSettings>
<mediamanager deletepaths="~/upload/images/Media/"
searchpatterns="*.asf,*.asx,*.wm,*.wmx,*.wmp,*.wma,*.wax,*.wmv,*.wvx,*.avi,*.wav,*.mpeg,*.mpg,*.mpe,*.mov,*.m1v,*.mp2,*.mpv2,*.mp2v,*.mpa,*.mp3,*.m3u,*.mid,*.midi,*.rm,*.rma,*.rmi,*.rmv,*.aif,*.aifc,*.aiff,*.au,*.snd"
uploadpaths="~/upload/images/Media/" viewpaths="~/upload/images/Media/"
maxuploadfilesize="20480000"
/>
<silverlightmanager deletepaths="~/upload/images/Silverlight/"
maxuploadfilesize="20480000" searchpatterns="*.*"
uploadpaths="~/upload/images/Silverlight/"
viewpaths="~/upload/images/Silverlight/" />
<templatemanager deletepaths="~/Template/"
searchpatterns="*.htm,*.html" uploadpaths="~/Template/"
viewpaths="~/Template/" />
<documentmanager deletepaths="~/upload/images/Document/"
maxuploadfilesize="20480000" searchpatterns="*.*"
uploadpaths="~/upload/images/Document/" viewpaths="~/upload/images/Document/" />
<content></content>
<flashmanager deletepaths="~/upload/images/Flash/"
maxuploadfilesize="20480000"
searchpatterns="*.swf" uploadpaths="~/upload/images/Flash/"
viewpaths="~/upload/images/Flash/" />
<imagemanager deletepaths="~/upload/images/Image/"
maxuploadfilesize="20480000"
searchpatterns="*.gif,*.xbm,*.xpm,*.png,*.ief,*.jpg,*.jpe,*.jpeg,*.tiff,*.tif,*.rgb,*.g3f,*.xwd,*.pict,*.ppm,*.pgm,*.pbm,*.pnm,*.bmp,*.ras,*.pcd,*.cgm,*.mil,*.cal,*.fif,*.dsf,*.cmx,*.wi,*.dwg,*.dxf,*.svf"
uploadpaths="~/upload/images/Image/" viewpaths="~/upload/images/Image/" />
</telerik:RadEditor>