Import websocket Package

Hi! I have made a websocket and I got probloms when I start the simulation, when I start it says "URCap requiers packge ‘org.ecliose.jetty.utli.ajax’ which is not available ". How do I install a new package correctly?

<Import-Package>
							com.ur.urcap.api*,org.osgi.core*,org.java-websocket*,org.glassfish*,org.eclipse.jetty*,
							*
						</Import-Package>
					</instructions>
				</configuration>
			</plugin>
			<plugin>
				<groupId>org.codehaus.mojo</groupId>
				<artifactId>exec-maven-plugin</artifactId>
				<version>1.1</version>
				<executions>
					<!-- generate URCap package after compiling -->
					<execution>
						<id>package-urcap</id>
						<phase>package</phase>
						<goals>
							<goal>exec</goal>
						</goals>
						<configuration>
							<executable>cp</executable>
								<commandlineArgs>target/${project.build.finalName}.jar target/${project.build.finalName}.urcap</commandlineArgs>
							<workingDirectory>.</workingDirectory>
						</configuration>
					</execution>
				</executions>
			</plugin>
			<plugin>
				<artifactId>maven-assembly-plugin</artifactId>
				<configuration>
					<descriptors>
						<descriptor>assembly.xml</descriptor>
					</descriptors>
				</configuration>
				<executions>
					<execution>
						<phase>package</phase>
						<goals>
							<goal>single</goal>
						</goals>
					</execution>
				</executions>
			</plugin>
		</plugins>
	</build>

	<dependencies>
		<dependency>
			<groupId>org.osgi</groupId>
			<artifactId>org.osgi.core</artifactId>
			<version>4.3.0</version>
		</dependency>
		
		<dependency>
  			<groupId>org.java-websocket</groupId>
  			<artifactId>Java-WebSocket</artifactId>
 	 		<version>1.5.3</version>
		</dependency>
		<dependency>
   			<groupId>org.glassfish</groupId>
   			<artifactId>javax.json</artifactId>
   			<version>1.0.4</version>
		</dependency>
		<!-- https://mvnrepository.com/artifact/org.eclipse.jetty/jetty-server -->
		<dependency>
    		<groupId>org.eclipse.jetty</groupId>
    		<artifactId>jetty-server</artifactId>
   			 <version>12.0.0.alpha2</version>
		</dependency>