Amir,
To remove asm jar, go to windows > Preferences > MyEclipse > Project Capabilities > Spring. Under Spring 2.5 tab, select the asm-2.2.3 jar and click “Remove”.
You can also refer to the following post for further reference –
https://www.genuitec.com/forums/topic/hibernate-3-2-and-spring-2-5/
Let me know if that helps.