The secondary objectives is to evaluate efficacy of a single intravesical instillation of hMaxi-K compared to the control group. Efficacy parameters that will be evaluated are: mean number of micturitions per 24 hours, mean number of urge incontinence episodes per 24 hours, mean number of urgency episodes per 24 hours, overall maximum bladder capacity, number of uninhibited contractions during the cystometry procedure, participant rating of urgency score, participant rating of perceived bladder condition severity, participant assessment of response to treatment, participant rating of Quality of Life (Kings Health Questionnaire), SF-12 Health Survey, International consultation on incontinence questionnaire, weight measurement of accidental bladder leaks.