Read operation exception MongoDB in EC2, but local is ok

My web app and mongo built in different ec2.

I run web app in localhost and connect mongo in ec2. It's OK.

but I deploy web app in ec2. It have exception

com.mongodb.MongoException$Network: Read operation to server /172.XX.XX.XX:27017 failed on database 
com.mongodb.DBTCPConnector.innerCall(DBTCPConnector.java:253)
com.mongodb.DBTCPConnector.call(DBTCPConnector.java:216)
com.mongodb.DBApiLayer$MyCollection.__find(DBApiLayer.java:288)
com.mongodb.DBApiLayer$MyCollection.__find(DBApiLayer.java:273)
com.mongodb.DBCursor._check(DBCursor.java:368)
com.mongodb.DBCursor._hasNext(DBCursor.java:459)
com.mongodb.DBCursor.hasNext(DBCursor.java:484)
com.google.code.morphia.query.MorphiaIterator.hasNext(MorphiaIterator.java:43)
com.google.code.morphia.query.QueryImpl.asList(QueryImpl.java:286)

my monogo congig

<bean id="mongoOptions" class="com.mongodb.MongoOptions">
<property name="autoConnectRetry" value="false" />
<property name="maxAutoConnectRetryTime" value="0" />
<property name="connectionsPerHost" value="10" />
<property name="connectTimeout" value="10000" />
<property name="cursorFinalizerEnabled" value="true" />
<property name="maxWaitTime" value="120000" />
<property name="threadsAllowedToBlockForConnectionMultiplier" value="5" />
<property name="socketTimeout" value="0" />
<property name="socketKeepAlive" value="false" />
<property name="safe" value="true" />
<property name="w" value="0" />
<property name="wtimeout" value="0" />
<property name="fsync" value="false" />
<property name="j" value="false" />
</bean>