My app gives 'Package file was not signed correctly' error on google play store.

After applying these steps my app gives 'Package file was not signed correctly' error on google play store.

My app link is here The tiapp.xml file of my app is as below:

<?xml version="1.0" encoding="UTF-8"?>
<ti:app xmlns:ti="http://ti.appcelerator.org">
    <property name="acs-oauth-secret-production" type="string">blablabla</property>
    <property name="acs-oauth-key-production" type="string">blablabla</property>
    <property name="acs-api-key-production" type="string">blablabla</property>
    <property name="acs-oauth-secret-development" type="string">blablabla</property>
    <property name="acs-oauth-key-development" type="string">blablabla</property>
    <property name="acs-api-key-development" type="string">blablabla</property>
    <deployment-targets>
        <target device="mobileweb">false</target>
        <target device="iphone">false</target>
        <target device="ipad">false</target>
        <target device="android">true</target>
        <target device="blackberry">false</target>
    </deployment-targets>
    <sdk-version>3.0.0.GA</sdk-version>
    <id>com.kulturdigital.androidApp</id>
    <name>KulturDigital</name>
    <version>1.0</version>
    <publisher>mehmetakboyun</publisher>
    <url>http://www.kulturdigital.com</url>
    <description>not specified</description>
    <copyright>2012 by mehmetakboyun</copyright>
    <icon>appicon.png</icon>
    <persistent-wifi>false</persistent-wifi>
    <prerendered-icon>false</prerendered-icon>
    <statusbar-style>default</statusbar-style>
    <statusbar-hidden>false</statusbar-hidden>
    <fullscreen>false</fullscreen>
    <navbar-hidden>true</navbar-hidden>
    <analytics>true</analytics>
    <guid>3fa22bd8-1f6c-4476-b0fa-68108f5f07b7</guid>
    <property name="ti.ui.defaultunit">system</property>
    <iphone>
        <orientations device="iphone">
            <orientation>Ti.UI.PORTRAIT</orientation>
        </orientations>
        <orientations device="ipad">
            <orientation>Ti.UI.PORTRAIT</orientation>
            <orientation>Ti.UI.UPSIDE_PORTRAIT</orientation>
            <orientation>Ti.UI.LANDSCAPE_LEFT</orientation>
            <orientation>Ti.UI.LANDSCAPE_RIGHT</orientation>
        </orientations>
    </iphone>
    <android xmlns:android="http://schemas.android.com/apk/res/android">
        <manifest>
            <supports-screens android:anyDensity="true"/>
        </manifest>
    </android>
    <mobileweb>
        <precache/>
        <splash>
            <enabled>true</enabled>
            <inline-css-images>true</inline-css-images>
        </splash>
        <theme>default</theme>
    </mobileweb>
    <modules/>
</ti:app>

is there any error or missing part in tiapp.xml file. My project name is KulturDigitalAnd. it is different than name in the tiapp.xml file. I created the keystore from titanium studio and then verified (jarsigner) and also zipaligned.

also when i verify the apk with jarsigner on terminal, it gives a warning after jar verified stmt:

-
-
-
jar verified.
 
Warning: 
This jar contains entries whose certificate chain is not validated.

How can i solve the problem please help me. thanks.