我从Dv7.0转换到DZ6.1时候提示出现这样的错误?

我从Dv7.0转换到DZ6.1时候提示出现这样的错误?请问如何解决???
Fatal error: Uncaught exception 'com_exception' with message '<b>Source:</b> ADODB.Fields<br/><b>Description:</b> 在对应所需名称或序数的集合中，未找到项目。' in D:\www\XConvert\data\dvbbs71ac - uc\step_1.php:51 Stack trace: #0 D:\www\XConvert\data\dvbbs71ac - uc\step_1.php(51): unknown() #1 D:\www\XConvert\include\convert.inc.php(61): require_once('D:\www\XConvert...') #2 D:\www\XConvert\index.php(14): require_once('D:\www\XConvert...') #3 {main} thrown in D:\www\XConvert\data\dvbbs71ac - uc\step_1.php on line 51

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