First of all , I really donot understand the fancy behind the floater rig for many anglers.A lot of people like to see their floats going down and they doing the strike to set the hook.It's undoubtedly one of the best things to do in angling. But there are many dynamics behind this fishing and they have to be followed very carefully. The float and the rig have to be properly balanced.Multiple things have to be taken into consideration in this way and they have to be critically balanced for a hook up.
Also the time of the day,location where you are fishing is important in float fishing. You can not have good strikes on float fishing at 2PM compared to 6PM/7PM unless you change the depth of the hook bait (if you are fishing in a deep area).
If float fishing doesnot work then remove float.Tie the corn on hair rig and cast it with sufficient weight .Put ur rod between rocks or in the rod holder. If corn doesnot work one day then try the dough bait or pound cake.
Always carry two to four different types of bait to the lake. that's why I mentioned to make three or four flavorings of corn and keep them handy. This way if one doesnt work that day, something else will. So go prepared and test the baits you have.
Do carry some flavorings like strawberry juice or banana shake or jalebi sheera and pour three or four drops on your bait to attract the fish.
Good luck and dont give up..!!
I live in Canada these days..I do visit nellore once a year and surely if things go well we will visit some day...!!