CRM 5.0 to 7.0 Upgrade - DVD Mount Point Issue

Dear Experts,

While upgrading CRM 5.0 to CRM 7.0 stopping in phase PREP_INPUT/EXTRACTKRN_PRE in the following input screen

Please enter mount points for the DVDs required for the upgrade.

Enter at least the mount point for the DVD titled "Kernel DVD for OS WINDOWS_X86_64 and Unicode"

MOUNT POINT 01 =

MOUNT POINT 02 =

MOUNT POINT 03 =

......

Not accepting any unc or directory inputs inside or outside Upgrade Directory and throwing the following message.

"The requested Data Carrier is not mounted on any of the mount points

you entered.

The mount point 'F:\usr\sap\C7T\upg\DVD\51036889\LABEL.ASC' cannot be accessed.Please enter mount points for the DVDs required for the upgrade.

Enter at least the mount point for the DVD titled "Kernel DVD for OS WINDOWS_X86_64 and Unicode"

Any hlep will be appreciated.

-Rayees Palot