CommScope Says Costs Rise, Sales to Fall  NEW YORK (Reuters) - Communications cable maker CommScope  Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=CTV.N target=/stocks/quickinfo/fullquote"&gt;CTV.N&lt;/A&gt; on Monday projected higher fourth-quarter costs  and lower sales at an Omaha manufacturing subsidiary, losing  nearly a quarter of its stock market value in after-market  trading.