copy paste in not working while using GNU Plotter

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http://stackoverflow.com – Hi Experts, I am new bee w.r.t to GNU Plotter. I written a small shell script which will read a file which keeps updating very frequently [for every 30 secs]. The file contents will be displayed using a GNU Plotter[even the graph will get updated dynamically]. every thing is working fine as my expected output but when ever I run the GNU Plotter script, I am unable to do Copy and Paste functionality in my local system. i.e I am running the script in a Remote Linux server, but i am unable to do copy paste funtionality in my local Windows system.[ I am sure its not Windows resourc (HowTos)