Failed to connect to binary FirefoxBinary with Selenium in Maven

I am running some Selenium-Tests. When I start them directly from Eclipse everything works fine. But when I Start them through Maven there the following Exception occurs:

org.openqa.selenium.WebDriverException(Failed to connect to binary FirefoxBinary(C:\winapp\Firefox\firefox.exe) on port 7055; process output follows: 
null
Build info: version: '2.26.0', revision: '18040', time: '2012-11-02 09:44:45'
System info: os.name: 'Windows 7', os.arch: 'x86', os.version: '6.1', java.version: '1.6.0_35'
Driver info: driver.version: FirefoxDriver)

I am using Firefox 10.0.10 ESR. I have also tried it with Selenium 2.25.0.

Here is my latest version of the pom.xml:

<dependencies>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.10</version>
    </dependency>
    <dependency>
        <groupId>org.seleniumhq.selenium</groupId>
        <artifactId>selenium-java</artifactId>
        <version>2.26.0</version>
    </dependency>
    <dependency>
        <groupId>org.seleniumhq.selenium</groupId>
        <artifactId>selenium-server</artifactId>
        <version>2.26.0</version>
        <exclusions>
            <exclusion>
                <groupId>javax.servlet</groupId>
                <artifactId>servlet-api</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>com.thoughtworks.xstream</groupId>
        <artifactId>xstream</artifactId>
        <version>1.4.1</version>
        <type>jar</type>
    </dependency>
    <dependency>
        <groupId>org.jdom</groupId>