JBOSS- Cache Preload is not loading data into cache on server startup , after introducing two cache clusters

I am using JBoss cache version -3.2.0.GA with JBOSS AS 5.1.0 GA And . My applications runs on two servers and creates two cache instances on each sever. I have two cache clusters JBOSS-cluster-Live and JBOSS-cluster-Proving. JBOSS-cluster-Live includes cache-1 on server-1 and cache-1 on sever-2 similarly JBOSS-cluster-Proving includes cache-2 on server-1 and cache-2 on sever-2. Application workes fine if I keep one server up. BUT when I restart both the server together it doesn't load the persisted data.

where as if i keep all 4 cache instance in one cluster then it loads the persisted state on start up.

here in my configurations

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cacheapi.cacheConfig.passivation=false
cacheapi.cacheConfig.preload=/
cacheapi.cacheConfig.cacheMode=REPL_SYNC
cacheapi.cacheConfig.shared=false
cacheapi.cacheConfig.singletonStoreEnabled=false
cacheapi.cacheConfig.singletonStoreClass=org.jboss.cache.loader.SingletonStoreCacheLoader
cacheapi.cacheConfig.jGroupsConfigLocation=file:/opt/bfcs/config/jgroups/replSync-service.xml
cacheapi.cacheConfig.clusterName=Jboss-cluster-Default
cacheapi.cacheConfig.fetchInMemoryState=false
cacheapi.cacheConfig.isolationLevelString=READ_COMMITTED
cacheapi.cacheConfig.async=false
cacheapi.cacheConfig.purgeOnStartup=false
cacheapi.cacheConfig.fetchPersistentState=true
cacheapi.cacheConfig.checkCharacterPortability=false
cacheapi.cacheConfig.ignoreModifications=false
cacheapi.cacheConfig.location=/opt/cacheData/default

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and jgroup's config file

<config>
<UDP singleton_name="udp_sync" mcast_port="${jboss.jgroups.udp_sync.mcast_port:45699}" mcast_addr="${jboss.jgroups.udp_sync.mcast_addr:229.11.11.11}" bind_port="${jboss.jgroups.udp_sync.bind_port:55250}" tos="8" ucast_recv_buf_size="20000000" ucast_send_buf_size="640000" mcast_recv_buf_size="25000000" mcast_send_buf_size="640000" loopback="true" discard_incompatible_packets="true" enable_bundling="false" ip_ttl="${jgroups.udp.ip_ttl:2}" enable_diagnostics="${jboss.jgroups.enable_diagnostics:true}" diagnostics_addr="${jboss.jgroups.diagnostics_addr:224.0.75.75}" diagnostics_port="${jboss.jgroups.diagnostics_port:7500}" thread_pool.enabled="true" thread_pool.min_threads="8" thread_pool.max_threads="200" thread_pool.keep_alive_time="5000" thread_pool.queue_enabled="true" thread_pool.queue_max_size="1000" thread_pool.rejection_policy="discard" oob_thread_pool.enabled="true" oob_thread_pool.min_threads="20" oob_thread_pool.max_threads="200" oob_thread_pool.keep_alive_time="1000" oob_thread_pool.queue_enabled="false" oob_thread_pool.rejection_policy="discard" />
<PING timeout="2000" num_initial_members="3" />
<MERGE2 max_interval="100000" min_interval="20000" />
<FD_SOCK start_port="${jboss.jgroups.udp_sync.fd_sock_port:54250}" />
<FD timeout="6000" max_tries="5" shun="true" />
<VERIFY_SUSPECT timeout="1500" />
<BARRIER />
<pbcast.NAKACK use_mcast_xmit="true" gc_lag="0" retransmit_timeout="300,600,1200,2400,4800" discard_delivered_msgs="true" />
<UNICAST timeout="300,600,1200,2400,3600" />
<pbcast.STABLE stability_delay="1000" desired_avg_gossip="50000" max_bytes="400000" />
<VIEW_SYNC avg_send_interval="10000" />
<pbcast.GMS print_local_addr="true" join_timeout="3000" shun="true" view_bundling="true" view_ack_collection_timeout="5000" resume_task_timeout="7500" />
<FRAG2 frag_size="60000" />

• <!-- pbcast.STREAMING_STATE_TRANSFER/
  -->
  <pbcast.STATE_TRANSFER />
  <pbcast.FLUSH timeout="0" start_flush_timeout="10000" />
  </config>

please help me in resolving this issue....

Pragya