DVD+R Multisession disc

[Derek]

Hi, I can burn data into a DVD+R disc using gnomebaker but when I try to
inport the session so I can continue burning more data i get this error and
CD drvie gets unmounted. Any help will be appreciated. Thank you.
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Error getting session information.

cdrecord: Warning: Running on Linux-2.6.15-27-386
cdrecord: There are unsettled issues with Linux-2.5 and newer.
cdrecord: If you have unexpected problems, please try Linux-2.4 or Solaris.
Error: Cannot gain SYS_RAWIO capability.Is cdrecord installed SUID root?
: Operation not permitted
cdrecord: Found DVD+ media but DVD+R/DVD+RW support code is missing.
cdrecord: If you need DVD+R/DVD+RW support, ask the Author for
cdrecord-ProDVD.
cdrecord: Free test versions and free keys for personal use are at
ftp://ftp.berlios.de/pub/cdrecord/ProDVD/
cdrecord: Unspecified command not implemented for this drive.
cdrecord: Cannot read first writable address
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