3 Answers

the sender probably didn't set up the link properly

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Reboot your computer or update your flash. The trouble seems to be with your computer and sending commands to the app. When was the last time you cleaned out your computer? 

Try downloading this Ccleaner and running all 3 options (click Windows tab and run, then Applications tab and run, then Click on the registry button and run).  It cleans up the junk floating around in your computer that anti virus's do not see as threats but can slow down your computer's performance. It's also a registry cleaner and removes unused and old registry entries and repairs broken ones .This can be run daily (takes less than a minute) and will let you know when it needs to be updated. http://www.piriform.com/ccleaner   

Also do these 

Delete Cookies http://www.ehow.com/how_18044_delete-cookies.html  

Delete Your Browser's History http://www.ehow.com/how_6075_delete-browsers-history.html  

Just like cars, computers need tune ups for optimal performance.