Yahoo Sitemap Problem

[Stay123]

One month earlier most of my site pages are indexed and coming in SERPs but after submitting sitemap at yahoo for my website I lost most of indexed pages on yahoo and it cause lot of loose in traffic which is coming from all those pages. Any one else seeing this.

[Stay123]

Any one PLZ.

[pizzaguy]

I am having the same problem. Very little traffic from yahoo hope it would change soon.