How to make a custom Kate highlighting?

**I need to make a simple custom highlighting file to highlight brackets, some regexps and words between “!” and “{$a}” for example. I created one xml file and put it into /usr/share/kde4/apps/katepart/syntax/ folder but my highlighting do not appear in highlighting section of Kate. I think I missed something, can u help me?
I made my highlighting file according to some kate highlighting manual and an example of GAP.xml file, so I’m almost certain, that it won’t work properly. So I would appreciate if u could help me with proper strings.

this is my highlighting file:**

<?xml version=“1.0” encoding=“UTF-8”?>
<!DOCTYPE language SYSTEM “language.dtd”>
<language name=“SumHigh” version=“1.1” kateversion=“2.0” section=“Markup” extensions="*.pel" author=“Pshkadko(tianeast@gmail.com)” license=“LGPL” >
<highlighting>

            &lt;list name="operators"&gt;
                    &lt;item&gt; & &lt;/item&gt;
                    &lt;item&gt; ! &lt;/item&gt;
                    &lt;item&gt; $p= &lt;/item&gt;
                    &lt;item&gt; $a= &lt;/item&gt;
                    &lt;item&gt; $w= &lt;/item&gt;
            &lt;/list&gt;

                                    &lt;contexts&gt;

                    &lt;context name="Top_Level" attribute="Normal Text" lineEndContext="#stay"&gt;
                            &lt;DetectSpaces /&gt;
                            &lt;DetectChar   context="Commentary"   char="#" /&gt;
                            &lt;RegExpr      context="#stay"        attribute="Number"             String="(\.)?|{\.}?" /&gt;
                    &lt;/context&gt;
                    &lt;context name="Commentary" attribute="Commentary" lineEndContext="#pop"&gt;
                    &lt;/context&gt;
            &lt;/contexts&gt;


            &lt;!-- ======== Item Data ======== --&gt;
            &lt;itemDatas&gt;
                    &lt;itemData name="Commentary"          defStyleNum="dsComment"  color="#009900" italic="1" /&gt;
                    &lt;itemData name="operators"     defStyleNum="dsKeyword"  color="#00FF00" bold="1" /&gt;
                    &lt;itemData name="Normal Text"         defStyleNum="dsNormal"   /&gt;
                    &lt;itemData name="String"              defStyleNum="dsString"  color="#000080" bold="1" /&gt;
                    &lt;itemData name="String2"              defStyleNum="dsString"  color="#00FF00" bold="1"  /&gt;
            &lt;/itemDatas&gt;

    &lt;/highlighting&gt;

    &lt;general&gt;
            &lt;comments&gt;
                    &lt;comment name="singleLine" start="#" /&gt;
            &lt;/comments&gt;
            &lt;keywords casesensitive="true" /&gt;
    &lt;/general&gt;