Trying to use launchd to make my iMac running 10.7.5 to email me it´s IP address not working
I don't know why I missed these the first time, but upon reviewing your problem just now, I noticed a few inconsistencies in the plist file which might well be the problem.  I think this will fix your problem.

    &lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"&gt; 
&lt;plist version="1.0"&gt;
                    &lt;dict&gt;
                            &lt;key&gt;Label&lt;/key&gt;
                                &lt;string&gt;com.fer.ip&lt;/string&gt;
                            &lt;key&gt;Program&lt;/key&gt;
                                &lt;string&gt;/usr/local/bin/IPSend.sh&lt;/string&gt;
                            &lt;key&gt;RunAtLoad&lt;/key&gt;
                                &lt;true/&gt;
                            &lt;key&gt;KeepAlive&lt;/key&gt;
                                &lt;false/&gt;    
                   &lt;/dict&gt; 
&lt;/plist&gt;


Hope that this helps!

F.