Open pdf file using command buttong in excel

Hello,
i have a form in excel which retrieves details of a user from one of the worksheet. against tht user row, there is a pdf file name which basically is a pdf file sitting on a location on the network. I need to open the pdf file using a command button. below is the code used..but m getting an error "there is an error opening this document file cannot be found"



Path = ActiveSheet.Cells(9, 2) 'this is the main path where all pdf files will b stored which is on a network
'if the path is Z:\SMD Filing System\SMD\
fname = "scan0001.pdf"


retval = Shell("C:\Program Files\Adobe\Reader 8.0\Reader\AcroRd32.exe path&fname", 1)