WinEdt (v7) is unable to close a PDF document

Hi Experts,
WinEdt (v7) is unable to close a pdf document and also can not accumulate a new version of the software as it has been blocked by Adobe Acrobat access to the file. I have received the error message “Cannot Open DDE Link to: “C:Program Files (x86)AdobeAcrobat9.0AcrobatAcrobat.exe
Service: AcroviewA10
Topic: Control
DDEOpen ("%$('PDF-View')", "("%$('Acro-DDE_Service');"")”.
The screenshot of the error message is given here. I tried to solve this problem. But no result.
Anyone having idea on these issues please help me.
Thanks in advance.
