hello i get the follow errors

Notice [PHP]: Undefined variable: xoops_url in file e:\Domainserver\power-dreams.com\html\xoops\class\xoopsblock.php(146) : eval()'d code line 5
Notice [PHP]: Undefined variable: xoops_url in file e:\Domainserver\power-dreams.com\html\xoops\class\xoopsblock.php(146) : eval()'d code line 5
Notice [PHP]: Undefined variable: xoops_url in file e:\Domainserver\power-dreams.com\html\xoops\class\xoopsblock.php(146) : eval()'d code line 8
Notice [PHP]: Undefined variable: xoops_url in file e:\Domainserver\power-dreams.com\html\xoops\class\xoopsblock.php(146) : eval()'d code line 8
Notice [PHP]: Undefined variable: xoops_url in file e:\Domainserver\power-dreams.com\html\xoops\class\xoopsblock.php(146) : eval()'d code line 10
Notice [PHP]: Undefined variable: xoops_url in file e:\Domainserver\power-dreams.com\html\xoops\class\xoopsblock.php(146) : eval()'d code line 10
Notice [PHP]: Undefined variable: xoops_url in file e:\Domainserver\power-dreams.com\html\xoops\class\xoopsblock.php(146) : eval()'d code line 12
Notice [PHP]: Undefined variable: xoops_url in file e:\Domainserver\power-dreams.com\html\xoops\class\xoopsblock.php(146) : eval()'d code line 14
Notice [PHP]: Undefined variable: xoops_url in file e:\Domainserver\power-dreams.com\html\xoops\class\xoopsblock.php(146) : eval()'d code line 16
Notice [PHP]: Undefined variable: xoops_url in file e:\Domainserver\power-dreams.com\html\xoops\class\xoopsblock.php(146) : eval()'d code line 16
Notice [PHP]: Undefined variable: xoops_url in file e:\Domainserver\power-dreams.com\html\xoops\class\xoopsblock.php(146) : eval()'d code line 22
Notice [PHP]: Undefined variable: xoops_url in file e:\Domainserver\power-dreams.com\html\xoops\class\xoopsblock.php(146) : eval()'d code line 22
Notice [PHP]: Undefined variable: xoops_url in file e:\Domainserver\power-dreams.com\html\xoops\class\xoopsblock.php(146) : eval()'d code line 24
Notice [PHP]: Undefined variable: xoops_url in file e:\Domainserver\power-dreams.com\html\xoops\class\xoopsblock.php(146) : eval()'d code line 24
Notice [PHP]: Undefined variable: xoops_url in file e:\Domainserver\power-dreams.com\html\xoops\class\xoopsblock.php(146) : eval()'d code line 27
Notice [PHP]: Undefined variable: xoops_url in file e:\Domainserver\power-dreams.com\html\xoops\class\xoopsblock.php(146) : eval()'d code line 27
Notice [PHP]: Undefined variable: xoops_url in file e:\Domainserver\power-dreams.com\html\xoops\class\xoopsblock.php(146) : eval()'d code line 29
Notice [PHP]: Undefined variable: xoops_url in file e:\Domainserver\power-dreams.com\html\xoops\class\xoopsblock.php(146) : eval()'d code line 29
Notice [PHP]: Undefined variable: xoops_url in file e:\Domainserver\power-dreams.com\html\xoops\class\xoopsblock.php(146) : eval()'d code line 31
Notice [PHP]: Undefined variable: xoops_url in file e:\Domainserver\power-dreams.com\html\xoops\class\xoopsblock.php(146) : eval()'d code line 31
Notice [PHP]: Undefined variable: xoops_url in file e:\Domainserver\power-dreams.com\html\xoops\class\xoopsblock.php(146) : eval()'d code line 33
Notice [PHP]: Undefined variable: xoops_url in file e:\Domainserver\power-dreams.com\html\xoops\class\xoopsblock.php(146) : eval()'d code line 33

i use XOOPS 2.0.6
so what should i do to fix this bug?