Failed to establish chain from reply when importing certificate using keytool

Issue

• I have an issue with when I tries to import a SSL certificate into my keystore.
  Here is what I did
  1) Create a key store.

/usr/java/jdk1.5.0_11/bin/keytool  -genkey -validity 1600 -keyalg rsa -sigalg SHA1withRSA -keystore example.keystore -alias example

2) Create a SSL request file

/usr/java/jdk1.5.0_11/bin/keytool -certreq -keystore  example.keystore -sigalg SHA1withRSA  -file example.req -alias example

3) I have sent the req file to our Allianz CA and they came back with
the cert file.
I then ran this command

/usr/java/jdk1.5.0\_11/bin/keytool -import -file signed\_example.cer  -keystore example.keystore -alias example

and It prompted me for password and asked me to confirm whether I should trust the certificate I am importing. I type yes. I got this error

keytool error: java.lang.Exception: Failed to establish chain from reply

• While we import certificate we get the below error output

[root@app1 bin]# keytool -importcert -alias jboss -keystore abc.keystore -file partners-entrustcert.crt Enter keystore password: keytool error: java.lang.Exception: Failed to establish chain from reply