Hi,
Any error your are getting ??
As you said your are entering some text into a text field and clicking on submit button and it is not taking you to next page
Reasons
1.There can be a hidden field which is not setting up properly - you need to take help of some developer and find out
2.You can try out fireevent command example below
type| target|tesing
fireevent|target|blur
3.if it is auto suggest text box then try out
typekeys instead of type command
4.Is Selenium server is running in "single window" mode ?? then try to run "multiwindow" mode .
As per my knowledge one of the above four can help you to solve your problem
KV