i have sql server 2005 service pack 4 evaluation edition , i want to upgrade to 2008 sql server sp1 evaluation edition define step to upgrade or solve error of failed in
Checks whether the specified feature meets SQL Server 2008 upgrade requirements.
The specified edition upgrade is not supported. For information about supported upgrade paths, see the SQL Server 2008 version and edition upgrade matrix in Books Online.
FeatureUpgradeMatrixCheck