Cut, Copy Paste Implementation in JApplet

I have created HTML TextEditor in applet using HTMLEditorkit class. Used the following action functions
CutAction
CopyAction
PasteAction
when i run the applet in applet viewer it pastes any text copied from outsite the applet in the applet,but when i run the same applet in web browser it does not paste the text copied from outside of applet window, only paste teh text which is copied from inside applet
Please tell me why i am getting such problem.
following is the applet which I have written in the HTML file
<OBJECT ID="TextEditor11" classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
WIDTH = 550 HEIGHT = 400 codebase="http://java.sun.com/products/plugin/1.3/jinstall-13-win32.cab#Version=1,3,0,0">
<PARAM NAME = CODE VALUE =htmltexteditor.TextEditor.class>
<PARAM NAME = CODEBASE VALUE = "." >
<PARAM NAME="type" VALUE="application/x-java-applet;version=1.3">
<COMMENT>
<EMBED ID="TextEditor11" type="application/x-java-applet;version=1.3"
CODE = "htmltexteditor.TextEditor.class" CODEBASE = "." WIDTH = 500 HEIGHT = 400 scriptable="false" mayscript="true" pluginspage="http://java.sun.com/products/plugin/1.3/plugin-install.html"><NOEMBED></COMMENT>
</NOEMBED></EMBED>
</OBJECT>
Waiting for your reply

I think it is because of applet security reason. Applet is unable to access any resources in local machine unless it is signed. So you perhaps need to sign your applet. If you are not using Java Plus-In, for IE (not Netscape), you can use menu �tools->Internet Options->Security� to give your applet permission to access local resource instead of signing your applet. Make sure your web site belong to Internet, local intranet, trusted site or restricted site. You can see this from the right bottom of IE browser when you applet is running.

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