Unexpected Error In For Loop

[saeeprakash]

Firefox version:
Selenium version: 2.9.1
SelBlocks version: 2.1

[info] Playing test case CA Dhruva
[info] Executing: |for | i=0;i<=5;i++ | |
[info] Executing: |click | xpath=(//input[@id='radio_1'])[3] | |
[info] Executing: |click | xpath=(//input[@id='radio_2'])[3] | |
[info] Executing: |click | xpath=(//input[@id='radio_3'])[3] | |
[info] Executing: |click | xpath=(//input[@id='radio_4'])[2] | |
[info] Executing: |click | xpath=(//input[@id='radio_5'])[2] | |
[info] Executing: |click | xpath=(//input[@id='radio_6'])[3] | |
[info] Executing: |click | xpath=(//input[@id='radio_7'])[2] | |
[info] Executing: |click | xpath=(//input[@id='radio_8'])[3] | |
[info] Executing: |click | xpath=(//input[@id='radio_9'])[3] | |
[info] Executing: |click | id=submit | |
[info] Executing: |pause | 10000 | |
[info] Executing: |endFor | | |
[error] There was an unexpected Alert! [Score Succesfully Updated
 ]
[info] Test case failed 

Hi I am new to script and implementing for loop in Selenium IDE using selblocks i was struck up with the Unexpected Alert as above. please help in this.

The Script is.
for i=0;i<=5;i++
click xpath=(//input[@id='radio_1'])[3]
click xpath=(//input[@id='radio_2'])[3]
click xpath=(//input[@id='radio_3'])[3]
click xpath=(//input[@id='radio_4'])[2]
click xpath=(//input[@id='radio_5'])[2]
click xpath=(//input[@id='radio_6'])[3]
click xpath=(//input[@id='radio_7'])[2]
click xpath=(//input[@id='radio_8'])[3]
click xpath=(//input[@id='radio_9'])[3]
click id=submit
pause 10000
endFor