Where are you getting your information on this? The only place I've seen this is in the WaPo, which is not a source I would consider golden.
Congressman Tom Reynolds in a statement issued today indicates that many months later, in the spring of 2006, he was approached by Congressman Alexander who mentioned the Foley issue from the previous fall. During a meeting with the Speaker he says he noted the issue which had been raised by Alexander and told the Speaker that an investigation was conducted by the Clerk of the House and Shimkus. While the Speaker does not explicitly recall this conversation, he has no reason to dispute Congressman Reynold’s recollection that he reported to him on the problem and its resolution.
As you can see, the speaker does not "explicitly recall this conversation".